private IHttpHandler GetHandler(HttpContext context, string filename)
{
Type t = null;
Exception typeException = null;
string className = filename;
if (Utility.Settings != null && Utility.Settings.UrlClassMappings.ContainsKey(filename))
{
className = Utility.Settings.UrlClassMappings[filename] as string;
if (context.Trace.IsEnabled) context.Trace.Write(Constant.AjaxID, "Url match to Type: " + className);
}
try
{
t = Type.GetType(className, true);
}
catch (Exception ex)
{
if (context.Trace.IsEnabled) context.Trace.Write(Constant.AjaxID, "Type not found: " + className);
typeException = ex;
}
AjaxProcessor[] p = new AjaxProcessor[3];
p[0] = new XmlHttpRequestProcessor(context, t);
p[1] = new IFrameProcessor(context, t);
p[2] = new ExtJSProcessor(context, t);
for (int i = 0; i < p.Length; i++)
{
if (!p[i].CanHandleRequest) continue;
if (typeException != null)
{
#if(WEBEVENT)
string errorText = string.Format(Constant.AjaxID + " Error", context.User.Identity.Name);
Management.WebAjaxErrorEvent ev = new Management.WebAjaxErrorEvent(errorText, WebEventCodes.WebExtendedBase + 200, typeException);
ev.Raise();
#endif
p[i].SerializeObject(new NotSupportedException("This method is either not marked with an AjaxMethod or is not available."));
return null;
}
AjaxMethodAttribute[] ma = (AjaxMethodAttribute[])p[i].AjaxMethod.GetCustomAttributes(typeof(AjaxMethodAttribute), true);
bool useAsync = false;
HttpSessionStateRequirement sessionReq = HttpSessionStateRequirement.ReadWrite;
if (ma.Length > 0)
{
useAsync = ma[0].UseAsyncProcessing;
if (ma[0].RequireSessionState != HttpSessionStateRequirement.UseDefault)
sessionReq = ma[0].RequireSessionState;
}
switch (sessionReq)
{
case HttpSessionStateRequirement.Read:
if (!useAsync)
return new AjaxSyncHttpHandlerSessionReadOnly(p[i]);
else
return new AjaxAsyncHttpHandlerSessionReadOnly(p[i]);
case HttpSessionStateRequirement.ReadWrite:
if (!useAsync)
return new AjaxSyncHttpHandlerSession(p[i]);
else
return new AjaxAsyncHttpHandlerSession(p[i]);
case HttpSessionStateRequirement.None:
if (!useAsync)
return new AjaxSyncHttpHandler(p[i]);
else
return new AjaxAsyncHttpHandler(p[i]);
default:
if (!useAsync)
return new AjaxSyncHttpHandlerSession(p[i]);
else
return new AjaxAsyncHttpHandlerSession(p[i]);
}
}
return null;
}
private IHttpHandler GetHandler(HttpContext context, string filename)
{
Type t = null;
Exception typeException = null;
string className = filename;
if (Utility.Settings != null && Utility.Settings.UrlClassMappings.ContainsKey(filename))
{
className = Utility.Settings.UrlClassMappings[filename] as string;
if (context.Trace.IsEnabled)
{
context.Trace.Write(Constant.AjaxID, "Url match to Type: " + className);
}
}
try
{
t = Type.GetType(className, true);
}
catch (Exception ex)
{
if (context.Trace.IsEnabled)
{
context.Trace.Write(Constant.AjaxID, "Type not found: " + className);
}
typeException = ex;
}
AjaxProcessor[] p = new AjaxProcessor[3];
p[0] = new XmlHttpRequestProcessor(context, t);
p[1] = new IFrameProcessor(context, t);
p[2] = new ExtJSProcessor(context, t);
for (int i = 0; i < p.Length; i++)
{
if (!p[i].CanHandleRequest)
{
continue;
}
if (typeException != null)
{
#if (WEBEVENT)
string errorText = string.Format(Constant.AjaxID + " Error", context.User.Identity.Name);
Management.WebAjaxErrorEvent ev = new Management.WebAjaxErrorEvent(errorText, WebEventCodes.WebExtendedBase + 200, typeException);
ev.Raise();
#endif
p[i].SerializeObject(new NotSupportedException("This method is either not marked with an AjaxMethod or is not available."));
return(null);
}
AjaxMethodAttribute[] ma = (AjaxMethodAttribute[])p[i].AjaxMethod.GetCustomAttributes(typeof(AjaxMethodAttribute), true);
bool useAsync = false;
HttpSessionStateRequirement sessionReq = HttpSessionStateRequirement.ReadWrite;
if (ma.Length > 0)
{
useAsync = ma[0].UseAsyncProcessing;
if (ma[0].RequireSessionState != HttpSessionStateRequirement.UseDefault)
{
sessionReq = ma[0].RequireSessionState;
}
}
switch (sessionReq)
{
case HttpSessionStateRequirement.Read:
if (!useAsync)
{
return(new AjaxSyncHttpHandlerSessionReadOnly(p[i]));
}
else
{
return(new AjaxAsyncHttpHandlerSessionReadOnly(p[i]));
}
case HttpSessionStateRequirement.ReadWrite:
if (!useAsync)
{
return(new AjaxSyncHttpHandlerSession(p[i]));
}
else
{
return(new AjaxAsyncHttpHandlerSession(p[i]));
}
case HttpSessionStateRequirement.None:
if (!useAsync)
{
return(new AjaxSyncHttpHandler(p[i]));
}
else
{
return(new AjaxAsyncHttpHandler(p[i]));
}
default:
if (!useAsync)
{
return(new AjaxSyncHttpHandlerSession(p[i]));
}
else
{
return(new AjaxAsyncHttpHandlerSession(p[i]));
}
}
}
return(null);
}